TW201334587A - Method of controlling minimization of drive tests - Google Patents

Abstract

A user equipment is configured to operate in an idle mode according to an MDT configuration. When receiving an activation signal from a base station, the user equipment is configured to execute one or multiple logged MDTs in the idle mode according to the activation signal and the MDT configuration.

Description

Control method for minimizing drive test

The invention relates to a method for controlling minimization of drive test, in particular to a method for a base station to control a user terminal to initiate a record-based minimization drive test in an idle mode.

The 3rd Generation Partnership Project (3GPP) has developed a universal mobile telecommunications system (UMTS) that uses wideband code division multiple access (WCDMA). The wireless access method is characterized by providing high spectrum utilization efficiency, high coverage, high quality and high rate of multimedia data transmission. A universal terrestrial radio access network (UTRAN) in a universal mobile telecommunications system can be regarded as a radio access network, which includes a plurality of base stations (Node-B, NB) for use with a plurality of base stations (Node-B, NB) User equipment (UE) communicates. In addition, in order to improve the general mobile telecommunications system, 3GPP further develops a long term evolution (LTE) system to meet the increasing demands of users. The Long Term Evolution (LTE) system is considered to provide a new wireless interface and wireless network architecture that provides high data transfer rates, low latency, packet optimization, and improved system capacity and coverage, including a number of evolved base stations (evolved Nodes). -B, eNB) is an evolved universal terrestrial radio access network (E-UTRAN), which is used to communicate with the UE on the one hand, and to handle non-processing on the other hand. The core network (CN) controlled by the non-access stratum (NAS) communicates, and the core network includes a servo gateway and a mobility management entity (MME). Device.

In order to enable the UE to receive services without being affected by severe disconnection or severe signal degradation, the wireless communication system (such as the Universal Mobile Telecommunications System or the Long Term Evolution System) needs to properly deploy the base station to provide The client has no gaps and good quality coverage. Therefore, the operator of the wireless communication system must spend considerable manpower and material resources to perform the quality measurement of the base station's signal products. Before the base station is deployed, the measurement results can be optimized and planned. There are many ways to perform measurements, such as measuring the strength and/or quality of signals at different times and locations. A more economical approach is to perform measurements by the user in the wireless communication system and to return the measurement results to the base station to provide the measurement results required by the operator. In other words, when a large number of clients perform measurement and return measurement results to the base station, the operator can use these measurement results to optimize and plan the base station deployment, thereby reducing the measurement requirements. Human and material resources. Therefore, the minimization of drive test (MDT) is defined in the 3GPP specifications, including both immediate minimization (LMT) and record-based minimization (logged MDT).

The client performs an instant minimization of the drive test in the connected mode, such as reference signal received power (RSRP), reference signal received quality (RSRQ), power margin ( Power headroom, PH), upload signal strength (upllink signal strength), or signal to interference and noise ratio (SINR) parameters, and transmit the measurement results to the base station when the return conditions are met. .

For the record-based minimization drive test, the user terminal receives the Logged Measurement Configuration message transmitted by the base station in the connected mode, which includes the measurement time length, the measurement interval or the measurement parameter, and the like. Minimize the road test configuration (MDT configuration). When the user enters the idle mode, the record-based configuration information can be used to perform the record-based minimization of the drive test and store the measurement results. When the amount of data exceeding the measurement time length or the measurement result exceeds a predetermined value, the user terminal stops performing the record-based minimization drive test, and transmits the measurement result to the base station after switching to the link mode.

In the prior art, when the user terminal does not perform a specific record-based minimization drive test in the idle mode, if the network requires the user to start performing the specific record-based minimization drive test for a specific reason, the user needs to First switch to the connected mode, and the network will then issue an instruction to start the record-based minimization of the drive test. In the prior art, the network cannot directly control the operation of the UE in the idle mode, and the UE needs to frequently switch between the link mode and the idle mode, thereby increasing power consumption and wasting network resources.

The present invention provides a method for controlling minimization of drive test, comprising: a user operating in an idle mode in accordance with a minimized drive test configuration; and when receiving a start message from a base station, the The client performs one or more specified record-based minimization of the drive test directly in the idle mode according to the start message and the minimized drive test configuration.

For a user terminal and a base station in a wireless communication system, the present invention provides a method for controlling record-based minimization of road test in an idle mode, and the user terminal can directly transmit the message according to the base station without switching the operation mode. Turn on record-based minimization of drive tests. In the present invention, the wireless communication system can be a general mobile telecommunication system or a long term evolution system, which is composed of a network end and a plurality of user terminals. In a general mobile telecommunications system, the network side can be a universal terrestrial global wireless access network, which can include a plurality of base stations. In a long term evolution system, the network may be an evolved universal terrestrial global radio access network, which may include a plurality of evolved base stations. The client can be a device such as a mobile phone, a notebook computer, a tablet computer, an e-book, and a portable computer system. However, the above is only an embodiment of the present invention and does not limit the scope of the present invention.

1 is a flow chart of a method for turning on a record-based minimization drive test in an idle mode in the present invention, which includes the following steps:

Step 110: The UE operates in an idle mode in accordance with a specific minimized drive test configuration.

Step 120: The UE receives the startup message sent by the base station in the idle mode.

Step 130: The UE performs one or more specified record-based minimization drive tests in the idle mode according to the startup message and the specific minimized drive test configuration.

When the client is in the connected mode the previous time, the base station can transmit a recorded measurement configuration message containing information related to the specific minimized drive test configuration. In step 110, the client can operate in accordance with a particular minimized drive test configuration, such as performing one or more record-based minimization drive tests.

In step 120, the network requires the client to perform one or more specified records for a specific reason (for example, it is desired to collect more base station information, collect specific base station information, or collect base station information when transmission is blocked). Minimize the drive test, at this time the base station will send a start message to the client.

According to the 3GPP specifications, when the UE is in the idle mode, the base station can transmit a paging message to the UE through a paging control channel (PCCH). The call message contains information such as the CN domain indicator, client identification, call range, and call reason. In the embodiment of the present invention, the activation message may be an over-the-air (OTA) call message, and the reason for the call may be “start record-based minimization drive test”. The reason for the call to "activate record-based minimization of drive test" may include performing one or more specified record-based minimization of drive test messages.

According to the 3GPP specifications, when the UE is in the connected mode, the base station can transmit a recorded measurement configuration message, which includes a minimization of the drive test configuration such as the measurement time length, the measurement interval or the measurement parameter. In an embodiment of the invention, the activation message may be an OTA recording type configuration configuration message, wherein the specific parameters of the recording type configuration configuration message are set to be related to performing one or more specified record type minimization drive tests.

When receiving the start message, the client may have completed all record-based minimization of the drive test; or the client may have completed one or more specified record-based minimization drive tests, but is still executing one or more other record types. Minimize drive test. In step 230, the UE directly performs one or more specified record-based minimization drive tests in the idle mode according to the startup message and the specific minimized drive test configuration.

In the present invention, when the UE receives the start message transmitted from the base station in the idle mode, it uses the previously obtained specific minimized drive test configuration to directly execute one or more specified record types in the idle mode. Road test. The present invention does not require the user terminal to switch between the connected mode and the idle mode, but directly performs one or more specified record-based minimization of the drive test in the idle mode according to the previously minimized drive test configuration and start message. Can reduce power consumption and avoid wasting network resources.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

110~130. . . step

1 is a flow chart of a method for turning on a recording type minimization drive test in an idle mode in the present invention.

110~130. . . step

Claims (7)

A method for controlling a minimization of drive test (MDT), comprising: a user operating in an idle mode according to a minimized drive configuration (MDT configuration); and receiving Upon initiation of a message from a base station, the client performs one or more specified record minimized drive tests (logged MDT) directly in the idle mode in accordance with the start message and the minimized drive test configuration. . The method of claim 1, wherein the client performs one or more record-based minimization drive tests in the idle mode in accordance with the minimized drive test configuration. The method of claim 2, wherein: when receiving the activation message, the client is performing the one or more record-based minimization drive tests, or has completed all record-based minimization drive tests. The method of claim 2, wherein the user is operating in a connected mode to receive a record associated with the minimized drive test configuration from the base station prior to entering the idle mode LoggedMeasurementConfiguration message. The method of claim 1, wherein the client is not performing the one or more specified record-based minimization drive tests when the start message is received. The method of claim 1, wherein the activation message is that the base station transmits a paging message through a paging control channel (PCCH), and one of the call messages is related to the call reason. Minimize the drive test by starting the one or more specified records. The method of claim 1, wherein the activation message is a recorded measurement configuration message comprising setting to initiate the one or more specified record-based minimization drive tests.